Mechanical standby system



FIG. 1 is a front elevation view of the mechanical standby system showing my new design.

FIG. 2 is a perspective elevation view thereof;

FIG. 3 is a left side elevation view thereof;

FIG. 4 is a right side elevation view thereof;

FIG. 5 is a top plan view thereof; and.

FIG. 6 is a bottom plan view thereof. 

CLAIM The ornamental design for a mechanical standby system, as shown. 